This article will introduce some interesting functions that trisi often uses in daily life, or which are rarely used. There are two types of introduction:
Famous functions-frequently used functions
Non-famous functions-although rarely used, they are
This article is not ready to introduce all of the Oracle functions, in the current situation, I do not have this time, need to learn too much, to spend most of the time on learning to use the technical aspects:), so if you are ready to learn all the
one, character processing function1. Character processing function:int isdigit (int ch) ;//Whether it is a number, that is, whether CH is a character in 0-9 int isxdigit (int ch) ;//Whether it is a hexadecimal number, that is, whether CH is a
Summarizes the common library functions in C language in Linux-String Conversion, character testing, and memory control.
When there is no IDE, it is necessary to remember the name, parameters, basic usage, and precautions of some common library
This article will introduce some of the functions that are often used in everyday life, or that are very interesting, though they are rarely used. It is divided into two kinds of introductions, namely:
Famous letters-functions that are often
One, string literal valueString literals are a string of constant characters, which are represented by 0 or more characters in double quotes, and all string literals in C + + are automatically added by the compiler at the end of a null character for
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